Until yesterday I was working on the same applications but CS5, with no problems.

When I open design files that use Lucida Grande Regular the files open fine but only the text in Lucida Grande Regular doesn't appear. Everything else is perfect.

When I go into Outline mode (AI) I can see that there's the small "x" sign where the Lucida Grande Regular text should be. The "x" is the same sign that usually marks the center of a shape or the start of a line of text. If I change to any other font, including Lucida Grande Bold it works fine.

I checked on Font Book and the Lucida Grande family seems fine.

I even reopened the same files on CS5 and they still work fine with Lucida Grande Regular.

If restarting the machine didn't do the trick, you can either try to re-install the font from a backup, or you might have to do a system restore (a very last step). In fact, if you have access to another Mac you might be able to get a copy there or if you have a blank hard drive, you might try to install a system on the blank hard drive and copy the font from that machine.

1. Drag the contents of the Library/ Fonts folder to a new folder on the desktop. (If you manually added fonts to the Library/ Application Support/ Adobe/ Fonts folder, also drag those fonts to the new folder.)

2. At the Finder, choose File > Find.

3 . Type AdobeFnt.lst, select the system drive, and then press Return.

4. Delete all AdobeFnt.lst files found (for example, AdobeFnt10.lst).

5. Restart the computer.

6 . Restart InDesign. InDesign creates new AdobeFnt.lst files.

Try to re-create the problem. Then, do one of the following:

If the problem doesn't recur, move one font back to the Library/Fonts folder, and then repeat steps 5-6 until you identify the problematic font.

If you have a font management utility, restart it and activate fonts in small groups or individually to identify the problematic font.

If the problem recurs, move the contents of the new folder on the desktop back to the Library/Fonts folder.

Note: If no adobefnt.lst file is found in the search, make sure that the search criteria are set to 'any' in the Find dialog box.

This solution seems to work. When I deleted the AdobeFnt.lst files found I could see Lucida Grande Regular again. I strated adding fonts and restarting and at some point it disappeared again.

This approach is so ridiculously painful since I have hundreds of fonts installed and it takes installing one by one and do the computer and InDesign restarts to see if it still works. It's going to take a while to test which font(s) are the ones creating the issue.

In the meantime, I'm forced to go back to CS5 where all fonts are still working perfectly. Such a shame wasting time and money on CS6 so far.

Points 1 through 6 worked fine. I opened InDesign and Illustrator and Lucida Grande Regular was fine.

Then, I followed the rest of your instructions:

Try to re-create the problem. Then, do one of the following:

If the problem doesn't recur, move one font back to the Library/Fonts folder, and then repeat steps 5-6 until you identify the problematic font.

I added one font, repeated steps 5-6 and it still worked. I then added more fonts, repeated 5-6 several times and then started adding fonts in batches since it took forever to do one by one. At some point it stopped working, as expected.

So, like I said, the solution seems to work but will just take too long to do the "add font/steps 5-6 cycle" for all of my fonts. More time that I have now with lots of work to do. This solution works well when you have only a few fonts. When you have hundreds of them it becomes a tremendous amount of work.

Move all the fonts back in the Library/Fonts folder , delete the Adobefnt*.lst files and then check , if incase this work it would be great otherwise there is one or more font causing this issue and we have to locate it.

and you can do the Binary division solution , which is to divide the set in 2 parts , and then locate which part is giving the problem , then divide that faulty part in 2 and repeat the steps until you find the culprit.

So I'm having this issue and have no Adobefnt*.lst file on my computer. At first I had Lucida Grande showing up as 6 Regular versions and 6 Bold, then I wasn't able to save and was getting the error message mentioned above. Then I restarted, after looking for Adobefnt*.lst, and now Regular is appearing italic. After looking at the font in Font Book (and anywhere else) it doesn't appear to have any problems outside Adobe products.

Mattrmcd if you are using the Adobe Creative apps then you do have Adobefnt files on your computer. The * is a wildcard as this will have a number next to it depending on which application created the the Adobefnt file.

Which operating system are you using so we can better advise you on how to search for these files?

After some time with Lucida Grande working, it's back. the solution above seems to be looking for the problem font. Since the problem font has been identified (and is a system font) removing it doesn't seem like a solution. I can try and replace the font file but that would mean changing it in the System folders and that doesn't seem like something I should have to do for a single app...

Mattrmcd and Estefaunt it seems like you both have another font installed which is causing a conflict with Lucida Grande. As Manish recommended you will want to reduce the amount of fonts currently installed on your computer and add them back slowly until you identify the font which is causing your difficulties.

You can use Font Book to disable all but the system fonts and then slowly add back the fonts as needed. Until the conflicting font is identified you will continue to need to delete the Adobefnt files.

Also if you are utilizing any type of third-party font management I would recommend disabling it until you are able to utilize Lucida Grande consistently.

I was having the same problem and fixed it. It turns out it was my font manager that was doing it. I would check the font on whatever font management applications you have. I simply disabled and reenabled all system fonts and it worked like a charm